Groff Upper Dam Reservoir Report
Nearby: Groff Lake Dam Share Lake Dam
Last Updated: December 5, 2025
Groff Upper Dam, located in Miller County, Missouri, was completed in 1959 and serves as a recreational resource for the local community.
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Summary
This private dam, with a height of 27 feet and a storage capacity of 58 acre-feet, is primarily used for recreational purposes, providing opportunities for activities such as fishing, boating, and wildlife viewing. Situated on the TR Tavern Creek, the dam's low hazard potential and "Not Rated" condition assessment make it a safe and enjoyable destination for water resource and climate enthusiasts.
Managed by private owners, Groff Upper Dam does not fall under state jurisdiction or regulation, allowing for flexible operation and maintenance. With a surface area of 4 acres and a drainage area of 77 square miles, the dam contributes to the local ecosystem and water supply. Despite lacking detailed information on certain aspects such as spillway type and outlet gates, the dam's structural integrity and historical significance add to its appeal for those interested in water resource management and environmental conservation.
While Groff Upper Dam may not have the same recognition as larger, federally-owned dams, its role in providing recreational opportunities and supporting the local ecosystem should not be overlooked. With its tranquil setting and potential for future improvements in emergency preparedness and risk assessment, this Earth-type dam offers a valuable case study for sustainable water resource management in the face of changing climate conditions.
Year Completed |
1959 |
Dam Height |
27 |
River Or Stream |
TR TAVERN CREEK |
Primary Dam Type |
Earth |
Surface Area |
4 |
Drainage Area |
77 |
Nid Storage |
58 |
Structural Height |
27 |
Hazard Potential |
Low |
Foundations |
Unlisted/Unknown |
Nid Height |
27 |
Seasonal Comparison
Weather Forecast
Nearby Streamflow Levels
Gasconade River At Jerome
|
944cfs |
Osage River Near Bagnell
|
1020cfs |
Little Piney Creek At Newburg
|
82cfs |
Osage River Below St. Thomas
|
1450cfs |
Gasconade River Near Hazelgreen
|
239cfs |
Big Piney Below Ft. Leonard Wood
|
297cfs |
Dam Data Reference
Condition Assessment
SatisfactoryNo existing or potential dam safety deficiencies are recognized. Acceptable performance is expected under all loading conditions (static, hydrologic, seismic) in accordance with the minimum applicable state or federal regulatory criteria or tolerable risk guidelines.
Fair
No existing dam safety deficiencies are recognized for normal operating conditions. Rare or extreme hydrologic and/or seismic events may result in a dam safety deficiency. Risk may be in the range to take further action. Note: Rare or extreme event is defined by the regulatory agency based on their minimum
Poor A dam safety deficiency is recognized for normal operating conditions which may realistically occur. Remedial action is necessary. POOR may also be used when uncertainties exist as to critical analysis parameters which identify a potential dam safety deficiency. Investigations and studies are necessary.
Unsatisfactory
A dam safety deficiency is recognized that requires immediate or emergency remedial action for problem resolution.
Not Rated
The dam has not been inspected, is not under state or federal jurisdiction, or has been inspected but, for whatever reason, has not been rated.
Not Available
Dams for which the condition assessment is restricted to approved government users.
Hazard Potential Classification
HighDams assigned the high hazard potential classification are those where failure or mis-operation will probably cause loss of human life.
Significant
Dams assigned the significant hazard potential classification are those dams where failure or mis-operation results in no probable loss of human life but can cause economic loss, environment damage, disruption of lifeline facilities, or impact other concerns. Significant hazard potential classification dams are often located in predominantly rural or agricultural areas but could be in areas with population and significant infrastructure.
Low
Dams assigned the low hazard potential classification are those where failure or mis-operation results in no probable loss of human life and low economic and/or environmental losses. Losses are principally limited to the owner's property.
Undetermined
Dams for which a downstream hazard potential has not been designated or is not provided.
Not Available
Dams for which the downstream hazard potential is restricted to approved government users.
Groff Upper Dam